Engine Valve Steels

Inspection and Testing

  • Surface Quality by M.P.I / Zyglo / ECT
  • Internal Soundness by Ultrasonic Testing
  • Dimension and Length Controls
  • Metallurgical Testing (Hardness, Microstructure, Inclusion, Grain Size etc.)

    • Manufacturing Route of Engine Valve Steels

    Martenstic Grades

    Martenstic Grades

    Austenitic Grades

    Austenitic Grades

    International Standards of Valve Steels
    DIN W.Nr BS JIS SAE IS
    X45CrSi9-3 1.4718 EN-52 SUH-1 HNV-3 X45Cr9Si3
    - - - SUH-11 - C50Cr9Si2
    X40CrSiMo10-2 1.4731 - SUH-3 HNV-1 X40Cr11Si2Mo1
    X85CrMoV18-2 1.4748 - - - -
    X55CrMnNiN20-8 1.4875 21-2N - EV-12 X55Cr21Mn8Ni2N
    X53CrMnNiN21-9 1.4871 21-4N SUH-35 EV-8 X53Cr22Mn9Ni4N
    - - 21-12N SUN-37 EV-4 X20Cr21Ni12N
    X50CrMnNiNbN21-9 1.4882 21-43N - - -
    X33CrNiMnN23-8 1.4866 23-8N - EV-16 X33Cr23Ni8Mn3N

    NiCr16Fe7TiAl
    Inconel 751

    		 2.4694 - SUH-751 J-775 -

     

    Supply Conditions

  • Lengths - Upto 8 Meters
  • Billets/Blooms End Finish - Auto Gas Cut
  • Specifications - EN, DIN, JIS, ASTM, BS etc
  • Identification - Marked With Heat Number, Grade, Size.

    • Chemical Composition
    Grades C Mn Si S Max P max Cr Mo Ni W N Nb+Ta Cu Ti Al Fe V
    X45CrSi9-3(EN-52) 0.40-0.50 0.60 Max 2.70-3.30 0.030 0.040 8.00-10.00 - 0.50 Max - - - - - - - -
    SUH-11 0.45-0.55 0.60 Max 1.00-2.00 0.030 0.030 7.50-9.50 - 0.60 Max - - - - - - - -
    SUH-3 0.35-0.45 0.60 Max 1.80-2.50 0.030 0.030 10.00-12.00 0.70-1.30 0.60 Max - - - 0.30 Max - - - -
    X85CrMoV18-2 0.80-0.90 1.50 Max 1.00 Max 0.030 0.040 16.50-18.50 2.00-2.50 - - - - - - - - 0.30-0.60
    21-2N 0.50-0.60 7.00-10.00 0.25 Max 0.030 0.045 19.50-21.50 - 1.50-2.75 - 0.20-0.40 - - - - - -
    21-4N 0.48-0.58 8.00-10.00 0.25 Max 0.030 0.045 20.00-22.00 - 3.25-4.50 -

    0.35-0.50

    		 - - - - - -
    21-12N 0.15-0.25 1.50 Max 0.70-1.25 0.030 0.050 20.00-22.00 - 10.50-12.50 - 0.15-0.25 - - - - - -
    21-43N 0.45-0.55 8-10 0.45 Max 0.030 0.45 20.00-22.00 - 3.50-5.50 0.80-1.50 0.40-0.60 1.80-2.50 - - - - -
    23-8N 0.28-0.38 1.50-3.50 0.50-1.00 0.030 0.045 22.00-24.00 0.50 Max 7.00-9.00 0.50 Max 0.25-0.35 - - - - - -
    Inconel 751 0.03-0.10 0.50 Max 0.50 Max 0.015 0.015 14.0-17.0 0.05 Max Base - - 0.70-1.20 0.50 Max 2.00-2.60 1.10-1.35 5.00-9.00 -
    Product Details
    Size Range
    Bright Bars Dia 5.00 mm to 100 mm
    Hot Rolled Annealed Wire Rod Dia 5.00 mm to 38 mm
    Hot Rolled Annealed Bard Dia 15 mm to 160 mm
    Standard Length 4000 +50/-00 mm or as per Customer Specified Length
    Supply Conditions
    Dimension Tolerance: ISO h9, h11, +0.05, 0.05/-0.05, +0.10 & Black Bar as per IS-3739
    Martensitic Grades Hot Rolled, Annealed or Hardened & Tempered
    Drawn & Ground, Peeled or Hardened & Tempered
    Austenitic Grades Hot Rolled, Solution Annealed, Peeled & Ground and Black Bar
    Mechanical Properties
    Grade Condition Yield Strength
    N/mm2    		 Tensile Strength
    N/mm2    		 %Elongation
    min    		 %Reduction in Area
    min    		 HRC
    EN-52/X45CrSi9-3 H & T 700 900-1100 14 40 25-35
    SUH-11 H & T 700 900-1100 14 40 25-35
    SUH-3 H & T 700 900-1100 14 40 25-35
    X85CrMoV18-2 H & T 800 1000-1200 7 12 25 min
    21-2N Solution Annealed 550 900-1150 8 10 30-40
    21-4N Solution Annealed 580 950-1200 8 10 30-40
    21-12N Solution Annealed 400 800 35 45 23-25
    21-43N Solution Annealed 580 950-1150 10 12 30 min
    21-8N Solution Annealed 550 850-1100 25 30 25 min
    Inconel 751 Solution Annealed 630-850 1100-1300 12 20 32-40